Our friend, the spy who escaped from the diamond smugglers in Chapter 1 (Problem 62 of Section 1.4), is on a secret mission in space. An encounter with an enemy agent leaves him with a mild concussion and temporary amnesia. Fortunately, he has a book that gives the formula for the motion of a projectile and the values of g for various heavenly bodies (32 ft/sec² on earth, 5.5 ft /sec² on the moon, 12 ft/sec² on Mars, and 28 ft/sec² on Venus). To deduce his whereabouts, he throws a rock vertically upward (from ground level) and notes that it reaches a maximum height of 37.5 ft and hits the ground 5 seconds after it leaves his hand. Where is he?

Data from Problem 62 of Section 1.4

The hero of a popular spy story has escaped from the headquarters of an international diamond smuggling ring in the tiny Mediterranean country of Azusa. Our hero, driving a stolen milk truck at 72 kilometers per hour, has a 40-minute head start on his pursuers, who are chasing him in a Ferrari going 168 kilometers per hour. The distance from the smugglers’ headquarters to the border, and freedom, is 83.8 kilometers. Will the spy make it?